Kolar-Begović, Zdenka, Ružica Kolar-Šuper, and Vladimir Volenec. “Equicevian Points and Equiangular Lines of a Triangle in an Isotropic Plane”. Sarajevo Journal of Mathematics 11, no. 1 (June 3, 2015): 101–107. Accessed December 25, 2025. https://sjm.anubih.ba/index.php/sjm/article/view/540.